Tae-Sik (Um Tae-Goo) is a member of Korean online community. He goes by the user name of “Chitkongpot”. Tae-Sik is in a flamewar with another user named “Jutjonseun.” One day, Tae-Sik is surprised attacked by "Jutjonseun" in person and gets physically beaten by him. The assault is recorded on video and it quickly spreads on the internet. Tae-Sik decides to get revenge on “Jutjonseun.” He begins to take ultimate fighting lessons from his friend Hee-Joon (Kwon Yool). There, Tae-Sik meets a girl fighter named Young-Ja (Ryoo Hye-Young).